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Pre-Grant Publication Number: 20070233761

Crossbar arithmetic processor

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#132Digital Logic using Molecular Electronics

Applies to Claims 1,11,16,6

Submitted by: Sandeep SharmaLast updated: over 5 years ago

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Summary / Description

Summary / Description	A reconfigurable architecture is based on chemically-assembled electronic nanotechnology (CAEN). A molecular latch based on molecular resonant tunneling diodes (RTDs) provides I/O-isolation, voltage restoration, and high fan-out. Moreover, a nanoblock based on CAEN has been used to implement a AND, OR, XOR gate to achieve computational objectives.

Basic Information

Type of Prior Art	Online Publication

URL	http://ieeexplore.ieee.org/xpl/...

Author/Creator	Goldstein, S.C.; Rosewater, D.

Title	Digital Logic using Molecular Electronics

Publication Date	February 7, 2002

Publisher	Solid-State Circuits Conference, 2002. Digest of Technical Papers. ISSCC. 2002 IEEE International

Directions to Document Location	Volume: 1, page(s): 204-459

Additional Information

Notes / To Do

Notes

Excerpt

Excerpt

Page 1, Para 4: “Figure 1 shows a schematic for a proposed nanoBlock that can be constructed using the above techniques. The MLA is a 2-D grid of reconfigurable diodes [2] that can be configured into circuits based on diode/resistor threshold logic. Figure 2 shows how a nanoBlock can be configured into an AND gate. The reconfigurable nature of the circuit also allows defects to be tolerated [3].”

Relevance

Claims

A computing device comprising: at least one crossbar array including a first set of N conductive parallel wires (N≧2) forming a set of columns and a second set of M conductive parallel wires (M≧2) forming a set of rows, and formed so as to intersect the first set of conductive parallel wires, wherein intersections are formed between the first and second sets of wires forming M×N crosspoints wherein each of the crosspoints is programmable so as to be in a relatively high conductive state representative of a binary value 1 or a relatively low conductive state representative of a binary value 0;

a programming unit configured to program the crosspoints to have one of the relatively high conductive state or the relatively low conductive state so that at least one column of the crossbar array stores a bit pattern representative of a programmed numerical value;

an input unit configured to provide a bit pattern representative of an input numerical value to the columns of the crossbar array; and

a post-processing unit configured to convert analog signals output from each of the rows of the crossbar array into digital output bit patterns and configured to combine the digital output bit patterns so as to form a resultant bit pattern representative of an output numerical value,

wherein the output numerical value is mathematically dependent on both the programmed numerical value and the input numerical value.

Relevance

Figures 1 and 2 illustrate a crossbar array having basic logic functionality. Additionally, the refrence describes that a nanoblock based on CAEN has been used to implement a AND, OR, XOR gate to achieve computational objectives.

Claim Chart

All

The computing device of Claim 1, wherein the wires of the at least one crossbar array are formed from individual nanotubes or nanotube ribbons.

Relevance

Figures 1 and 2 describes how nanotubes and nanotube ribbons have been used to form a crossbar array.

Claim Chart

All

A method comprising: providing at least one crossbar array including a first set of N conductive parallel wires (N≧2) forming a set of columns and a second set of M conductive parallel wires (M≧2) forming a set of rows, and formed so as to intersect the first set of conductive parallel wires, wherein intersections are formed between the first and second sets of wires forming M×N crosspoints wherein each of the crosspoints is programmable so as to be in a relatively high conductive state representative of a binary value 1 or a relatively low conductive state representative of a binary value 0;

programming the crosspoints to have one of the relatively high conductive state or the relatively low conductive state so that at least one column of the crossbar array stores a bit pattern representative of a programmed numerical value;

inputting a bit pattern representative of an input numerical value to the columns of the crossbar array; and

converting analog signals output from each of the rows of the crossbar array into digital output bit patterns and configured to combine the digital output bit patterns so as to form a resultant bit pattern representative of an output numerical value,

wherein the output numerical value is mathematically dependent on both the programmed numerical value and the input numerical value.

Relevance

Claim Chart

All

The method of Claim 11, wherein the wires of the at least one crossbar array are formed from individual nanotubes or nanotube ribbons.

Relevance

Figures 1 and 2 describes how nanotubes and nanotube ribbons have been used to form a crossbar array.

Claim Chart

All

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